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52ad194e | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
663996b3 MS |
2 | #pragma once |
3 | ||
663996b3 | 4 | #include <inttypes.h> |
4c89c718 MP |
5 | #include <stdbool.h> |
6 | #include <stddef.h> | |
7 | #include <stdint.h> | |
db2df898 MP |
8 | #include <stdio.h> |
9 | #include <time.h> | |
663996b3 MS |
10 | |
11 | typedef uint64_t usec_t; | |
12 | typedef uint64_t nsec_t; | |
13 | ||
2897b343 MP |
14 | #define PRI_NSEC PRIu64 |
15 | #define PRI_USEC PRIu64 | |
16 | #define NSEC_FMT "%" PRI_NSEC | |
17 | #define USEC_FMT "%" PRI_USEC | |
60f067b4 | 18 | |
663996b3 MS |
19 | #include "macro.h" |
20 | ||
21 | typedef struct dual_timestamp { | |
22 | usec_t realtime; | |
23 | usec_t monotonic; | |
24 | } dual_timestamp; | |
25 | ||
5a920b42 MP |
26 | typedef struct triple_timestamp { |
27 | usec_t realtime; | |
28 | usec_t monotonic; | |
29 | usec_t boottime; | |
30 | } triple_timestamp; | |
31 | ||
5eef597e MP |
32 | #define USEC_INFINITY ((usec_t) -1) |
33 | #define NSEC_INFINITY ((nsec_t) -1) | |
34 | ||
35 | #define MSEC_PER_SEC 1000ULL | |
60f067b4 JS |
36 | #define USEC_PER_SEC ((usec_t) 1000000ULL) |
37 | #define USEC_PER_MSEC ((usec_t) 1000ULL) | |
5eef597e MP |
38 | #define NSEC_PER_SEC ((nsec_t) 1000000000ULL) |
39 | #define NSEC_PER_MSEC ((nsec_t) 1000000ULL) | |
40 | #define NSEC_PER_USEC ((nsec_t) 1000ULL) | |
60f067b4 JS |
41 | |
42 | #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC)) | |
5eef597e | 43 | #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC)) |
60f067b4 | 44 | #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE)) |
5eef597e | 45 | #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE)) |
60f067b4 | 46 | #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR)) |
5eef597e | 47 | #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR)) |
60f067b4 | 48 | #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY)) |
5eef597e | 49 | #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY)) |
60f067b4 | 50 | #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC)) |
5eef597e | 51 | #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC)) |
60f067b4 | 52 | #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC)) |
5eef597e | 53 | #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC)) |
663996b3 | 54 | |
8a584da2 MP |
55 | /* We assume a maximum timezone length of 6. TZNAME_MAX is not defined on Linux, but glibc internally initializes this |
56 | * to 6. Let's rely on that. */ | |
57 | #define FORMAT_TIMESTAMP_MAX (3+1+10+1+8+1+6+1+6+1) | |
e842803a | 58 | #define FORMAT_TIMESTAMP_WIDTH 28 /* when outputting, assume this width */ |
663996b3 MS |
59 | #define FORMAT_TIMESTAMP_RELATIVE_MAX 256 |
60 | #define FORMAT_TIMESPAN_MAX 64 | |
61 | ||
4c89c718 | 62 | #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1) |
5eef597e | 63 | |
5a920b42 MP |
64 | #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) {}) |
65 | #define TRIPLE_TIMESTAMP_NULL ((struct triple_timestamp) {}) | |
60f067b4 | 66 | |
663996b3 | 67 | usec_t now(clockid_t clock); |
d9dfd233 | 68 | nsec_t now_nsec(clockid_t clock); |
663996b3 MS |
69 | |
70 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts); | |
71 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u); | |
72 | dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u); | |
13d276d0 | 73 | dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u); |
663996b3 | 74 | |
5a920b42 MP |
75 | triple_timestamp* triple_timestamp_get(triple_timestamp *ts); |
76 | triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u); | |
77 | ||
78 | #define DUAL_TIMESTAMP_HAS_CLOCK(clock) \ | |
79 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC) | |
80 | ||
81 | #define TRIPLE_TIMESTAMP_HAS_CLOCK(clock) \ | |
82 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) | |
83 | ||
98393f85 | 84 | static inline bool dual_timestamp_is_set(const dual_timestamp *ts) { |
5eef597e MP |
85 | return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) || |
86 | (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY)); | |
60f067b4 | 87 | } |
663996b3 | 88 | |
98393f85 | 89 | static inline bool triple_timestamp_is_set(const triple_timestamp *ts) { |
5a920b42 MP |
90 | return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) || |
91 | (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY) || | |
92 | (ts->boottime > 0 && ts->boottime != USEC_INFINITY)); | |
93 | } | |
94 | ||
95 | usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock); | |
96 | ||
663996b3 | 97 | usec_t timespec_load(const struct timespec *ts) _pure_; |
8a584da2 | 98 | nsec_t timespec_load_nsec(const struct timespec *ts) _pure_; |
663996b3 MS |
99 | struct timespec *timespec_store(struct timespec *ts, usec_t u); |
100 | ||
101 | usec_t timeval_load(const struct timeval *tv) _pure_; | |
102 | struct timeval *timeval_store(struct timeval *tv, usec_t u); | |
103 | ||
104 | char *format_timestamp(char *buf, size_t l, usec_t t); | |
5eef597e | 105 | char *format_timestamp_utc(char *buf, size_t l, usec_t t); |
14228c0d | 106 | char *format_timestamp_us(char *buf, size_t l, usec_t t); |
5eef597e | 107 | char *format_timestamp_us_utc(char *buf, size_t l, usec_t t); |
663996b3 MS |
108 | char *format_timestamp_relative(char *buf, size_t l, usec_t t); |
109 | char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy); | |
110 | ||
663996b3 MS |
111 | int parse_timestamp(const char *t, usec_t *usec); |
112 | ||
113 | int parse_sec(const char *t, usec_t *usec); | |
81c58355 | 114 | int parse_sec_fix_0(const char *t, usec_t *usec); |
bb4f798a | 115 | int parse_sec_def_infinity(const char *t, usec_t *usec); |
db2df898 | 116 | int parse_time(const char *t, usec_t *usec, usec_t default_unit); |
663996b3 | 117 | int parse_nsec(const char *t, nsec_t *nsec); |
60f067b4 JS |
118 | |
119 | bool ntp_synced(void); | |
5eef597e MP |
120 | |
121 | int get_timezones(char ***l); | |
b012e921 | 122 | bool timezone_is_valid(const char *name, int log_level); |
5eef597e | 123 | |
aa27b158 | 124 | bool clock_boottime_supported(void); |
5a920b42 | 125 | bool clock_supported(clockid_t clock); |
5eef597e | 126 | clockid_t clock_boottime_or_monotonic(void); |
e735f4d4 | 127 | |
81c58355 MB |
128 | usec_t usec_shift_clock(usec_t, clockid_t from, clockid_t to); |
129 | ||
d9dfd233 | 130 | int get_timezone(char **timezone); |
db2df898 MP |
131 | |
132 | time_t mktime_or_timegm(struct tm *tm, bool utc); | |
133 | struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc); | |
134 | ||
135 | unsigned long usec_to_jiffies(usec_t usec); | |
4c89c718 | 136 | |
52ad194e MB |
137 | bool in_utc_timezone(void); |
138 | ||
4c89c718 MP |
139 | static inline usec_t usec_add(usec_t a, usec_t b) { |
140 | usec_t c; | |
141 | ||
142 | /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't | |
143 | * overflow. */ | |
144 | ||
145 | c = a + b; | |
146 | if (c < a || c < b) /* overflow check */ | |
147 | return USEC_INFINITY; | |
148 | ||
149 | return c; | |
150 | } | |
151 | ||
81c58355 | 152 | static inline usec_t usec_sub_unsigned(usec_t timestamp, usec_t delta) { |
4c89c718 MP |
153 | |
154 | if (timestamp == USEC_INFINITY) /* Make sure infinity doesn't degrade */ | |
155 | return USEC_INFINITY; | |
81c58355 | 156 | if (timestamp < delta) |
4c89c718 MP |
157 | return 0; |
158 | ||
159 | return timestamp - delta; | |
160 | } | |
2897b343 | 161 | |
81c58355 MB |
162 | static inline usec_t usec_sub_signed(usec_t timestamp, int64_t delta) { |
163 | if (delta < 0) | |
164 | return usec_add(timestamp, (usec_t) (-delta)); | |
165 | else | |
166 | return usec_sub_unsigned(timestamp, (usec_t) delta); | |
167 | } | |
168 | ||
2897b343 MP |
169 | #if SIZEOF_TIME_T == 8 |
170 | /* The last second we can format is 31. Dec 9999, 1s before midnight, because otherwise we'd enter 5 digit year | |
171 | * territory. However, since we want to stay away from this in all timezones we take one day off. */ | |
172 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 253402214399000000) | |
173 | #elif SIZEOF_TIME_T == 4 | |
174 | /* With a 32bit time_t we can't go beyond 2038... */ | |
175 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 2147483647000000) | |
176 | #else | |
b012e921 | 177 | #error "Yuck, time_t is neither 4 nor 8 bytes wide?" |
2897b343 | 178 | #endif |
b012e921 MB |
179 | |
180 | int time_change_fd(void); |